145 lines
4.0 KiB
C++
145 lines
4.0 KiB
C++
#include <cstdlib>
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#include <sstream>
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#include <osg/io_utils>
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#include <osg/ArgumentParser>
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#include <osg/Geode>
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#include <osgViewer/Viewer>
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#include <osgViewer/ViewerEventHandlers>
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#include <osgGA/StateSetManipulator>
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void textInfo(osgText::Text* text)
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{
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const osgText::Text::TextureGlyphQuadMap& tgqm = text->getTextureGlyphQuadMap();
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const osgText::Text::TextureGlyphQuadMap::const_iterator tgqmi = tgqm.begin();
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const osgText::Text::GlyphQuads& gq = tgqmi->second;
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osgText::String& s = text->getText();
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for(unsigned int i = 0; i < s.size(); i++)
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{
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osg::Vec2 ul = gq.getCoords()[0 + (i * 4)]; // upperLeft
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osg::Vec2 ll = gq.getCoords()[1 + (i * 4)]; // lowerLeft
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osg::Vec2 lr = gq.getCoords()[2 + (i * 4)]; // lowerRight
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osg::Vec2 ur = gq.getCoords()[3 + (i * 4)]; // upperRight
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/*
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osg::Vec3 ul = gq.getTransformedCoords(0)[0 + (i * 4)];
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osg::Vec3 ll = gq.getTransformedCoords(0)[1 + (i * 4)];
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osg::Vec3 lr = gq.getTransformedCoords(0)[2 + (i * 4)];
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osg::Vec3 ur = gq.getTransformedCoords(0)[3 + (i * 4)];
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*/
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osg::notify(osg::NOTICE)
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<< "'" << static_cast<char>(s[i]) << "':"
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<< " width(" << lr.x() - ll.x() << ")"
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<< " height(" << ul.y() - ll.y() << ")" << std::endl << "\t"
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<< "ul(" << ul << "), "
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<< "ll(" << ll << "), "
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<< "lr(" << lr << "), "
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<< "ur(" << ur << ")"
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<< std::endl
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;
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}
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}
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osg::Camera* createOrthoCamera(double width, double height)
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{
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osg::Camera* camera = new osg::Camera();
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camera->getOrCreateStateSet()->setMode(
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GL_LIGHTING,
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osg::StateAttribute::PROTECTED | osg::StateAttribute::OFF
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);
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osg::Matrix m = osg::Matrix::ortho2D(0.0f, width, 0.0f, height);
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camera->setProjectionMatrix(m);
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camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
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camera->setViewMatrix(osg::Matrix::identity());
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camera->setClearMask(GL_DEPTH_BUFFER_BIT);
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camera->setRenderOrder(osg::Camera::POST_RENDER);
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return camera;
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}
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osgText::Text* createLabel(const std::string& l, const char* f, unsigned int size)
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{
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static osg::Vec3 pos(10.0f, 10.0f, 0.0f);
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osgText::Text* label = new osgText::Text();
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osgText::Font* font = osgText::readFontFile(f);
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label->setFont(font);
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label->setCharacterSize(size);
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label->setFontResolution(size, size);
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label->setColor(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
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label->setPosition(pos);
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label->setAlignment(osgText::Text::LEFT_BOTTOM);
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// It seems to be important we do this last to get best results?
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label->setText(l);
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textInfo(label);
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pos.y() += size + 10.0f;
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return label;
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}
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typedef std::list<unsigned int> Sizes;
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int main(int argc, char** argv)
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{
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osgViewer::Viewer viewer;
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osg::ArgumentParser args(&argc, argv);
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// Make sure we have the minimum args...
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if(argc <= 2)
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{
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osg::notify(osg::FATAL) << "usage: " << args[0] << " fontfile size1 [size2 ...]" << std::endl;
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return 1;
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}
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viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
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viewer.addEventHandler(new osgViewer::StatsHandler());
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viewer.addEventHandler(new osgViewer::WindowSizeHandler());
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osg::Group* group = new osg::Group();
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osg::Camera* camera = createOrthoCamera(1280.0f, 1024.0f);
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// Create the list of desired sizes.
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Sizes sizes;
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for(int i = 2; i < argc; i++)
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{
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if(!args.isNumber(i)) continue;
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sizes.push_back(std::atoi(args[i]));
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}
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osg::Geode* geode = new osg::Geode();
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// Add all of our osgText drawables.
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for(Sizes::const_iterator i = sizes.begin(); i != sizes.end(); i++)
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{
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std::stringstream ss;
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ss << *i << " 1234567890 abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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geode->addDrawable(createLabel(ss.str(), args[1], *i));
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}
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camera->addChild(geode);
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group->addChild(camera);
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viewer.setSceneData(group);
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return viewer.run();
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}
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